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    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Document</title>
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    <body>
        <script>
            // 打印0-20之间的整数, 将每个数输出到控制台

            for (let i = 0; i <= 20; i++) {
                console.log(i);
            }
        </script>
    </body>
</html>
